need perl suggestion

umbrella2 · 07-03-2009, 03:29 AM

hi all,
I'm writing this two code snippets and need suggestion about that.
1) So, how I can print line wich contained into $x?

Code:

#!/usr/bin/perl
use diagnostics;
use strict;
my @file= <DATA>;
my $str = join( '', @file);
my $x = '/dev/sda1';
if($str =~  /Mounted\s+on(.*?)/sgi ){
my @s = join '', $1;
print   grep(/$x/,@s);
}
__DATA__
Filesystem           1K-blocks      Used Available Use% Mounted on
/dev/sda3            487730816 484563176   3167640 100% /
/dev/sda1               248895    138484     97561  59% /boot
/dev/sdb1            488252928 314127712 174125216  65% /mnt/s
/dev/sdc1             15674912  14776312    898600  95% /media/disk-2

2) and there...
If I to enroll values to 'a' and 'b' and in the next I need use foreach and evaluate either value from either key. When that set key 'a' it should be evaluate 1 and second if that need. Second and other values should be use only if use of first was destroyed. Actually I need perl-tecnics how that make.

Code:

%h = (
a=>1,
b=>2,
c=>3,
d=>4,
);
my $x;
%h = map {$_ => [$h{$_}]} keys %h;
push @{$h{a}}, 2; 
push @{$h{b}}, 4;

PMP · 07-03-2009, 05:17 AM

Try out this code section for ur first problem

my $x = '/dev/sda1';
while (<DATA>)
{
chomp;
my ($fs, $bl, $us, $a, $up, $m) = split (/\s+/, $_);
if ($fs eq $x)
{
print "Filesystem=$fs,1K-blocks=$bl,Used=$us,Available=$a,Use=$up,Mounted=$m\n";
}
}

Please clarify your second question

umbrella2 · 07-03-2009, 06:12 AM

Quote:

Please clarify your second question

ok, what I do...

Code:

my $z;
foreach(%h){
my $w =$_;
foreach(@{$h{$w}}){
my @a;
$z=$_;
nextvalue:
if(grep(/$h{$z}/i,@a)){
}else{
if(destroyer($z)){
...work..
}else{
foreach (@{$h{$_}}){
$lz=$_; 
	if($lz ne $z){
	goto nextvalue;
	}
}
}
push(@a,"$w\n"); # so as not get it twice
}

}
}
sub destroyer(){
if(...smth...){
return 0;
}else{
return 1;
}
}

unfortunaly, the some keys can use twice several values and then I've got not true result.

Telemachos · 07-03-2009, 06:38 AM

Can everyone please both put code into [code][/code] tags and indent the code properly? It's very hard to read something longer than a few lines with zero indentation.

@Umbrella - if you know that the keys are not unique, then a hash may not be your best option. Hash keys must be unique. You probably need to use a different data structure. Edit: Actually, now that I look at your first post again, I realize that I have nearly no idea what you are actually trying to do. Can you please explain it more clearly?

umbrella2 · 07-03-2009, 09:52 AM

I'm gave code snippet which kind of works, but not for everyone key. So, if $z missed, then func destroyer return zero and main while should go to the next value in 'a'(which's not equal other pasted values in there) and so on... until destroyer returned 1. And if destroyer returned 1 in first value that's good and it enough for 'a'. Because I need do work everyone key, but if value in that key was true.

umbrella2 · 07-05-2009, 09:04 AM

any ideas?

and could you help me with that...

Code:

my $ip ='10.10.10.10'
exec qq( /usr/bin/perl -p -i -e 's/^external_addr.*$/external_addr=$ip/g' /etc/pf.conf) ;
system q(/usr/bin/perl -p -i -e 's/^external_addr.*$/external_addr="$ip"/g' /etc/pf.conf);

I tried different ways todo that, but unfortunaly it doesn't work.